Condensed Consolidated Statements of Equity (Unaudited) - USD ($) $ in Thousands	Total		Common Shares	Additional Paid-in Capital	Treasury Shares	Accumulated Other Comprehensive Loss	Retained Earnings	Noncontrolling Interests
Beginning Balance at Dec. 31, 2016	$ 790,697		$ 96	$ 222,910	$ (45,383)	$ (12,468)	$ 609,206	$ 16,336
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(3,035)						(3,089)	54
Other comprehensive income (loss)	504	[1]				504
Other change in noncontrolling interest	(8,359)							(8,359)
Stock awards, stock option exercises and other shares issued to employees and directors, net of income tax of ($0) (105 shares) and ($323) (126 shares)	2,055			(2,549)	4,604
Dividends declared ($0.16 and $0.165 per common share)	(4,500)						(4,500)
Restricted share award dividend equivalents	0			5	52		(57)
Ending Balance at Mar. 31, 2017	777,362		96	220,366	(40,727)	(11,964)	601,560	8,031
Beginning Balance at Dec. 31, 2017	822,899		96	224,622	(40,312)	(2,700)	633,496	7,697
Beginning Balance at Dec. 31, 2017	822,899		96	224,622	(40,312)	(2,700)	633,496	7,697
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(1,982)						(1,700)	(282)
Other comprehensive income (loss)	(1,288)	[1]				(1,288)
Stock awards, stock option exercises and other shares issued to employees and directors, net of income tax of ($0) (105 shares) and ($323) (126 shares)	1,532			(2,632)	4,164
Cash received from noncontrolling interest	14,700							14,700
Adoption of accounting standard, net of income tax of $2,869	(8,441)						(8,441)
Dividends declared ($0.16 and $0.165 per common share)	(4,663)						(4,663)
Restricted share award dividend equivalents	0				120		(120)
Ending Balance at Mar. 31, 2018	$ 822,757		$ 96	$ 221,990	$ (36,028)	$ (3,988)	$ 618,572	$ 22,115

[1] All amounts are net of tax. Amounts in parentheses indicate debits